Suspense in ReactJS is a feature that allows components to “wait” for something before rendering. It was introduced in React 16.6 and allows developers to handle asynchronous operations and data fetching in their components more elegantly.
Suspense allows a component to pause its rendering while it waits for asynchronous data to be loaded. For example, it can display a loading spinner or a generic placeholder while waiting for data to load, and then smoothly switch to rendering real content when the data is ready.
This simplifies the process of asynchronous data handling and makes code easier to read and manage compared to using complex life-cycle methods. As a result, handling scenarios like data fetching, code splitting, and resource loading in React components becomes less error-prone.